:root {
  --bg: #0e1117;
  --panel: #161b25;
  --panel2: #1d2430;
  --ink: #e7ecf3;
  --muted: #9aa6b6;
  --accent: #6ea8fe;
  --accent2: #b890ff;
  --good: #4ade80;
  --bad: #f87171;
  --root: #ffcc4d;
  --third: #6ee7b7;
  --fifth: #93c5fd;
  --border: #2a3342;
  --radius: 12px;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 -apple-system, "Segoe UI", system-ui, sans-serif;
  display: flex; flex-direction: column; min-height: 100vh;
}
a { color: var(--accent); }

/* ---------- header ---------- */
header {
  display: flex; align-items: center; gap: 18px;
  padding: 10px 18px; background: var(--panel);
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.brand { font-size: 20px; font-weight: 700; letter-spacing: .3px; }
.brand span { background: linear-gradient(90deg,var(--accent),var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
nav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
nav button {
  background: transparent; color: var(--muted); border: none;
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
nav button:hover { color: var(--ink); background: var(--panel2); }
nav button.active { color: var(--ink); background: var(--panel2); box-shadow: inset 0 -2px 0 var(--accent); }
.midi-status { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
#midi-btn { background: var(--panel2); color: var(--ink); border: 1px solid var(--border); padding: 6px 10px; border-radius: 8px; cursor: pointer; }
#midi-btn.on { border-color: var(--good); color: var(--good); }

/* ---------- main ---------- */
main { flex: 1; padding: 22px; max-width: 1100px; margin: 0 auto; width: 100%; }
h1 { font-size: 24px; margin: 0 0 4px; }
h2 { font-size: 18px; margin: 22px 0 8px; }
.muted { color: var(--muted); }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.btn { background: linear-gradient(90deg,var(--accent),var(--accent2)); color: #0b0f16; border: none; font-weight: 600; padding: 10px 16px; border-radius: 10px; cursor: pointer; }
.btn:hover { filter: brightness(1.08); }
.ghost { background: var(--panel2); color: var(--ink); border: 1px solid var(--border); padding: 8px 14px; border-radius: 9px; cursor: pointer; }
.ghost:hover { border-color: var(--accent); }
.pill { display: inline-block; font-size: 11px; padding: 2px 9px; border-radius: 99px; background: var(--panel2); color: var(--muted); border: 1px solid var(--border); }

/* ---------- lessons ---------- */
.level-group { margin-bottom: 8px; }
.level-title { font-size: 12px; text-transform: uppercase; letter-spacing: 1.5px; color: var(--accent2); margin: 18px 0 8px; }
.lesson-list { display: grid; grid-template-columns: repeat(auto-fill,minmax(240px,1fr)); gap: 12px; }
.lesson-tile { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; cursor: pointer; transition: .15s; }
.lesson-tile:hover { border-color: var(--accent); transform: translateY(-2px); }
.lesson-tile h3 { margin: 0 0 4px; font-size: 15px; }
.lesson-tile .meta { font-size: 12px; color: var(--muted); }
.progress-dot { display: inline-block; width: 8px; height: 8px; border-radius: 99px; background: var(--border); margin-right: 4px; }
.progress-dot.on { background: var(--good); }
.lesson-body p { margin: 8px 0; }
.lesson-body ul { margin: 8px 0; padding-left: 22px; }
.lesson-body li { margin: 4px 0; }

/* ---------- question / practice ---------- */
.q-wrap { text-align: center; }
.q-prompt { font-size: 19px; margin: 10px 0 18px; }
.choices { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }
.choice { background: var(--panel2); border: 1px solid var(--border); color: var(--ink); padding: 12px 18px; border-radius: 10px; cursor: pointer; font-size: 15px; min-width: 120px; }
.choice:hover { border-color: var(--accent); }
.choice.correct { border-color: var(--good); background: rgba(74,222,128,.12); color: var(--good); }
.choice.wrong { border-color: var(--bad); background: rgba(248,113,113,.12); color: var(--bad); }
.feedback { margin: 16px 0; font-size: 15px; min-height: 24px; }
.feedback.ok { color: var(--good); }
.feedback.no { color: var(--bad); }
.grade-row { display: flex; gap: 10px; justify-content: center; margin-top: 14px; }
.session-bar { display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.audio-btn { font-size: 22px; }
.entered-notes { font-size: 14px; color: var(--muted); min-height: 22px; margin-top: 8px; }

/* ---------- explorer / tables ---------- */
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
select, input[type=text] { background: var(--panel2); color: var(--ink); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 14px; }
table { border-collapse: collapse; width: 100%; margin-top: 10px; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }
.note-chip { display: inline-block; background: var(--panel2); border: 1px solid var(--border); border-radius: 7px; padding: 3px 9px; margin: 2px; font-variant-numeric: tabular-nums; }
.note-chip.root { border-color: var(--root, #e8b44d); color: var(--root, #e8b44d); }

/* ---------- circle of fifths ---------- */
#circle-svg { display: block; margin: 0 auto; max-width: 520px; }
.cof-seg { cursor: pointer; transition: .15s; }
.cof-seg:hover .cof-bg { fill: var(--panel2); }
.cof-seg.active .cof-bg { fill: rgba(110,168,254,.25); stroke: var(--accent); }
.cof-label { fill: var(--ink); font-size: 15px; font-weight: 600; text-anchor: middle; dominant-baseline: middle; pointer-events: none; }
.cof-minor { fill: var(--muted); font-size: 11px; }

/* ---------- stats ---------- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(140px,1fr)); gap: 12px; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; text-align: center; }
.stat .n { font-size: 30px; font-weight: 700; color: var(--accent); }
.stat .l { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }

.today-card { border-left: 3px solid var(--accent); }
.ch-bar { fill: var(--panel2); stroke: var(--border); stroke-width: .5; }
.ch-ok { fill: var(--good); opacity: .85; }
.ch-lab { fill: var(--muted); font-size: 11px; }
.mel-head.mel-hit { fill: #2e9e4f; }
.mel-head.mel-miss { fill: #cc3b2e; }

/* ---------- chord dictionary & progression drills ---------- */
.keys-svg { margin: 10px 0; }
.kw { fill: #f7f4ec; stroke: #2a2f38; stroke-width: 1; }
.kw-on { fill: #7ea7e8; }
.kw-root { fill: #e8b44d; }
.kb { fill: #20242c; stroke: #000; }
.kb-on { fill: #5b87d6; }
.kb-root { fill: #d99a2b; }
.inv-on { border-color: var(--accent); color: var(--accent); }
.prog-steps { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; align-items: center; margin: 12px 0; }
.prog-step { background: var(--panel2); border: 1px solid var(--border); border-radius: 9px;
  padding: 8px 14px; font-weight: 600; transition: .15s; }
.prog-step.now { border-color: var(--accent); box-shadow: 0 0 10px rgba(126,167,232,.35); }
.prog-step.done { border-color: var(--good); color: var(--good); }
.prog-step.miss { border-color: var(--bad); color: var(--bad); }
.prog-arrow { color: var(--muted); }

/* ---------- engraved notation (Bravura SMuFL) ---------- */
@font-face {
  font-family: 'Bravura';
  src: url('../fonts/Bravura.woff2') format('woff2');
  font-display: block; /* avoid tofu flash on PUA glyphs */
}
.staff-host { display: flex; justify-content: center; margin: 14px 0; }
.staff-svg { background: #fdfcf8; border-radius: 10px; padding: 4px; }
.staff-line { stroke: #1d2128; stroke-width: 1.1; }
.staff-bar { stroke: #1d2128; stroke-width: 2.6; }
.staff-stem { stroke: #14181f; stroke-width: 1.5; }
.staff-beam { fill: #14181f; }
.staff-glyph { fill: #14181f; font-family: 'Bravura'; }
.staff-note { fill: #14181f; }
.staff-label { fill: #5b6470; font-weight: 600; font-family: inherit; }
.staff-count { fill: #5b6470; font-weight: 600; letter-spacing: 1px; font-family: inherit; }
.tap-pad { display: block; margin: 14px auto 4px; width: 150px; height: 150px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #2a3344, #161b25); border: 2px solid var(--border);
  color: var(--muted); font-size: 19px; font-weight: 700; cursor: pointer; user-select: none; }
.tap-pad:hover { border-color: var(--accent); color: var(--ink); }
.tap-pad.hit { background: radial-gradient(circle at 35% 30%, #3d5a9e, #1d2c4f); border-color: var(--accent); color: #fff; transform: scale(.96); }
.beat-lights { display: flex; gap: 12px; margin-top: 14px; }
.beat-dot { width: 22px; height: 22px; border-radius: 50%; background: var(--panel2); border: 1px solid var(--border); transition: .05s; }
.beat-dot.on { background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.beat-dot.on.accent { background: var(--root); box-shadow: 0 0 14px var(--root); }

/* ---------- piano dock ---------- */
#piano-dock { position: sticky; bottom: 0; background: var(--panel); border-top: 1px solid var(--border); padding: 8px 14px 14px; }
.dock-bar { display: flex; align-items: center; gap: 16px; margin-bottom: 8px; font-size: 13px; color: var(--muted); flex-wrap: wrap; }
.dock-label { font-weight: 600; color: var(--ink); }
.toggle { display: flex; align-items: center; gap: 6px; cursor: pointer; }

.piano { position: relative; height: 150px; width: 100%; max-width: 1100px; margin: 0 auto;
  background: #0a0d12; border-radius: 8px; user-select: none; touch-action: none; }
.key { position: absolute; top: 0; cursor: pointer; }
.key.white { height: 100%; background: linear-gradient(#fdfdfd,#e9edf2); border: 1px solid #b9c0cc; border-radius: 0 0 5px 5px; z-index: 1; }
.key.black { height: 62%; background: linear-gradient(#2b333f,#11161e); border: 1px solid #000; border-radius: 0 0 4px 4px; z-index: 2; }
.key.white:hover { background: linear-gradient(#fff,#dde3ea); }
.key.white.pressed { background: linear-gradient(#cfe0ff,#9ec1ff); }
.key.black.pressed { background: linear-gradient(#5670a0,#2a3850); }
.key.hl { box-shadow: inset 0 0 0 3px var(--accent); }
.key.hl-root { box-shadow: inset 0 0 0 3px var(--root); }
.key.hl-3rd { box-shadow: inset 0 0 0 3px var(--third); }
.key.hl-5th { box-shadow: inset 0 0 0 3px var(--fifth); }
.key.hl-target { box-shadow: inset 0 0 0 3px var(--accent2); background: linear-gradient(#e7d6ff,#c9a8ff); }
.key-label { position: absolute; bottom: 6px; left: 50%; transform: translateX(-50%);
  font-size: 10px; font-weight: 700; pointer-events: none; }
.key.white .key-label { color: #1b2230; }
.key.black .key-label { color: #dfe6f0; bottom: 4px; }

/* computer-keyboard guide tags (shown when 'Clavier d'ordi' is on) */
.kb-hint { position: absolute; top: 6px; left: 50%; transform: translateX(-50%);
  font-size: 11px; font-weight: 800; pointer-events: none; border-radius: 4px; padding: 1px 4px; }
.key.white .kb-hint { color: #fff; background: var(--accent); }
.key.black .kb-hint { color: #14181f; background: var(--accent2); top: auto; bottom: 18px; }

/* collapsible dock + horizontal scroll on narrow screens */
.piano-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; overscroll-behavior-x: contain; }
.oct-nav { display: none; gap: 4px; }
.oct-nav button { padding: 6px 12px; font-size: 15px; }
@media (max-width: 700px) { .oct-nav { display: inline-flex; } }
@media (pointer: coarse) {
  .piano { height: 165px; }            /* taller keys under fingers */
  .key.black { height: 58%; }
  .choice { padding: 14px 16px; }      /* fatter answer buttons */
  .ghost, .btn { padding: 11px 16px; }
}
#piano-dock.collapsed .piano-scroll { display: none; }
#piano-dock.collapsed { padding-bottom: 8px; }
#kb-hint { font-size: 12px; }

@media (max-width: 700px) {
  nav button { padding: 6px 9px; font-size: 13px; }
  main { padding: 12px; }
  h1 { font-size: 21px; }
  .piano { height: 130px; width: 720px; max-width: none; } /* fixed width → scrollable, fingers fit */
  .dock-bar { gap: 10px; font-size: 12px; }
  .choice { padding: 12px 14px; min-width: 90px; }
  .stat .n { font-size: 22px; }
  .lesson-list { grid-template-columns: 1fr 1fr; }
}